Picture stretched on CRT 32"

My picture on the TV is parallelagramed with the top stretched and I am loosing the top and left hand side of the picture. It has had a dry solder joint problem that I have cured but I am stumped at the picture problem.

I can tell what is the power supply but I don't understand B+, where it is or what voltage it should be. The dry solder joints were on a choke(coil) near the HT transformer.I can tell what is the power supply but I don't understand B+, where it is or what voltage it should be. The dry solder joints were on a choke(coil) near the HT transformer.

I think the dry solder joints have caused the problem of the picture stretching. I have checked around but nothing else is amiss. At first the TV wouldn't switch on unless you banged it but the picture wasn't stretched. This went on for about 1 month before the picture started stretching. I then found the dry solder joints on a choke near the HT transformer (flyback?) and this cured the switching on problem but the picture stretching stayed. I think the problem is now a dead or dieing component but which one???I think the dry solder joints have caused the problem of the picture stretching. I have checked around but nothing else is amiss. At first the TV wouldn't switch on unless you banged it but the picture wasn't stretched. This went on for about 1 month before the picture started stretching. I then found the dry solder joints on a choke near the HT transformer (flyback?) and this cured the switching on problem but the picture stretching stayed. I think the problem is now a dead or dieing component but which one???

2 Answers

Anonymous

Re: Picture stretched on CRT 32"

B+ means your secondary supply voltage it supply your horizontal
tansistor and in the flayback transformer. it rated 80volts to 120
volts.the choke coil you have is maybe for the horizontal linearity,
try to solder it.thats the reason why you picture is being streched
out.

Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.

Related Questions:

No it is not a tube problem .............hit your TV on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board ( also on CRT circuit board ) at some soldering joints crack develops....then due to loose contact picture becomes small in size or abnormal width, or rolls etc ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears normally for some time............so solution is .....TV main board & CRT circuit board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer & just ask him to resolder joints .............iam from bangalore - computers, laptop, printers, etc ) ----- good TV service engineer will charge less .........

hit your TV lightly on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board at some soldering joints crack develops....then due to loose contact picture becomes small in size or disappears ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears for some time............so solution is ......TV main board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again (2inch on top will also gets solved )................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer -------- IAM SURE PROBLEM IS NOT BECAUSE OF YOUR SON BUT DUE TO ITS AGE

when picture is getting smaller in size or goes away or moves towards one side ( like yours) then hit your TV lightly on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some CRT computer monitors & CRT TVs on main board at some soldering joints crack develops....then due to loose contact picture becomes small in size or disappears ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears for some time............so solution is ......TV main board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re- soldered ...100% it works again................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer

Well, first the 100Hz issue. Your TV will display a descriptor or the signal it is receiving, not a descriptor of the picture you are watching. Your TV panel has a native resolution and frequency. In your case, that frequency is 100Hz. Everything, like it or not, must be converted to 100Hz for the TV to work. In your manual, you are simply adjusting setting which smooth the picture and make it flow better than it would at 50Hz. This feature is slight of hand and is probably working just fine. As for the picture fitting the screen; HD programs fill the screen of HD channels.... SD (Standard Definition) programs use black bars on each side when on HD channels. You can use any available wide or picture size feature your TV may have to stretch the picture. You may be unable to stretch the picture, due to restrictions (some TVs will not resize HD formats).

Before you fool around with this, it may be under warranty. Check that first. Second, does the picture stretch in both directions or just vertically? If just vertically is it more pronounced at the top?
Thanks,
Dan